as technology has evolved so has the way kids keep tabs on mister claus. first phone calls, then the web. >> it looks like it's going to be another successful journey thanks to norad. >> reporter: now there's norad santa tracker apps for iphone, android and windows phone users, and sleigh watchers can also keep up on bing maps or on twitter, at norad santa. norad had been tracking santa with google earth since 2004, but this year the two entities went separate ways. norad's teamed with microsoft, and google has set up a tool of their own. google's santa tracker has been highlighting north pole preps in the lead-up to christmas. and in his spare time, santa's been making phone calls to good girls and boys, and sending messages via his google plus page. on the big night, kids of all ages can watch santa hop from continent to continent with google maps and google earth. those out doing last-minute shopping can follow along with their smartphone app for android. i'm karin caifa reporting. >> coming up, your full sports, with the forty- niners, jason applebaum.